Nodetool proxyhistograms

proxyhistograms - Provide the latency request that recorded by the coordinator. This command is helpfull if you encounter with slow node operations.

For example:

nodetool proxyhistograms

proxy histograms
Percentile      Read Latency     Write Latency     Range Latency
                 (micros)          (micros)          (micros)
50%                   353.50           1214.50           4103.00
75%                   972.50           2969.25           5073.25
95%                  4832.85          15394.80          14981.50
98%                  8181.18          21873.00          27640.50
99%                  8356.63          21873.00          31843.79
Min                    22.00            207.00            499.00
Max                  8365.00          21873.00         208960.00
Parameter Description
Percentile Latency rank
Read Latency Read latency
Write Latency Write latency
Range Latency Range scan latency for the node

Nodetool Reference